BIOL 1902 Lecture Notes - American Bittern, Crypsis, Automeris Io

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taupezebra881

29 Mar 2012

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Document Summary

Natural history some notes for week 1. Natural history: an observational science that involves looking at all living things. Natural history knowledge is essential for assessments of ecosystems or habitats. It is also one of the most enjoyable pursuits in the world. Clothes must be worn and are not optional. Animals: a kingdom that includes birds, reptiles, amphibians, fish, mammals, Insects, spiders, clams, and lots of other organisms. It consists of all the selective pressures placed on plants and animals by the environment (such as wind or cold or drought) or by animals (such as predators or even members of the same species). Those poorly adapted do not survive to pass on their genes and those that are better adapted tend to survive and pass on their genes allowing the adaptation to persist into the future and possibly become more refined. Natural selection was first recognized by charles darwin.

Related Questions

Explain in your own words how natural selection help species adapt to the environment. what are some of the problems or limitations with adaptation thruough natural selection for an animal in a rapidly changing environment?

define learning, and describe the advantages of learning for adaptation to the environment.

discuss how nature and nurture interact to help species adapt to the environment and survive.

Which of the following best describes the principle of evolution by natural selection?

A. Individuals within a population are genetically identical and natural selection occurs randomly

B. Individuals within a population exhibit genetic variation and those that are best adapted to their environment survive

C. Individuals within a population exhibit genetic variation and those that are least adapted to their environment survive

D. Individuals within a population undergo genetic mutation and natural selection occurs randomly

E. Individuals within a population exhibit genetic variation and natural selection occurs randomly

Which statement about evolution by natural selection isfalse?

Natural selection allows organisms with higher fitness toreproduce more successfully.

Natural selection favors those traits that confer higherfitness in the environment.

Natural selection is a random change in characteristics of apopulation over generations.

Evolution by natural selection affects populations oforganisms, not individual organisms.

An organism's fitness depends on its _____.

ability to survive and reproduce

ability to swap genetic material with other organisms

physical size

ability to mutate

population

Consider the heavily armored stickleback fish population thatcolonized the lake. If all the individuals in that population weregenetically identical, what do you predict would happen when theycolonized the freshwater lake?

The population would increase, as it has increased foodresources.

The population would evolve through natural selection to bebetter adapted to its environment.

The population would decrease due to more juvenile fish beingeaten.

No answer text provided.

Which of the following are adaptations?

Thicker beaks on finches that allows them to eat large seeds,when large seeds are the most abundant.

Less armor on stickleback fish in freshwater that allows themto grow faster to avoid predation.

More armor on stickleback fish in the ocean that prevents themfrom being eaten by larger predators.

None of the above.

All of the above.